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(No Model.)

1?. L. GREGORY.

, SECOND HAND ATTACHMENT FOR OLOCKS. No. 281,493. Patented July 1-7,1883.

N. PErERs, Phowulm n hc wamimnn. D. C.

. brations 0f the arm.

' UNITED STATES PATENT OFFICE.

ERED L. GREGORY, or NELIGr ERRAsKA.

SECOND-HAND ATTACHMENT. FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No. 281,493, dated July1-7, 1883.

Application filed August 11, 1882. (N0 model.)

To all whom it may concern:

Be it known that 1, FREE L. GREGORY, a

citizen of the United States of America, residing at Neligh, in thecounty of Antelope and State of Nebraska, have invented certain new anduseful Improvements in Clock Attachments, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to clocks; and it consists in an improvedsecondhand attachment, as herein shown and described.

In the accompanying drawings, Figure 1 represents part of aclockmovement provided tached to any vibrating part of theclock-escapement which vibrates twice in a second, and will impart alike movement to the said arm, which acts against the wheel A, moving itone tooth forward at each stroke, or two vi- Thus the wheel A is movedby the impulse-arm B sixty times to effect one revolution of the wheel,such revo-.

lution occupying one minute, and the arm 13 making one hundred andtwenty vibrations in the same time. The impulsearm may be hinged orcoupled .to the verge or other vibrating part, in which case it may bepressed to wheel A by a spring or by its own weight.

E indicates a retaining-lever provided with a diamond-shaped click ordetent, at e, to engage with the teeth of wheel A; After the impulse-armhas made its stroke against wheel A, moving it one-sixtieth of arevolution in the proper direction, the wheel is detained by lever E inposition to receive the next stroke from arm B, the said detent-leverbeing actu ated or brought in contact by its weight or by means of aspring. The lever E is usually secured to a cock-plate F, which alsoforms a bearing for the shaft a, which carries the secend-hand, the samebeing usually placed at the dial end of the shaft, (see Fig. 2,) inwhich G indicates the dial-plate, g the second-hand, and H and I thefront and rear plates of the clock-movement.

The devioe'may be variously modified in construction and arrangement,and, when a separate dial for it'is used, may be placed in anyconvenient part of the clock-case, the parts being constructedaccordingly to effect he requisite connections and operation. When whatis known as a sweep secondhand is used with the same dial of the hourand minute hands, the attachment may be placed at the rear of theclock-movement, as shown in the drawings, a hollow minute-hand shaft being used. The attachment may be placed at the front of theclock-movement and a small dial provided for it on the ordinaryclock-dial or it may be located with a dial above, below, 7

or at either side of the clock-dial, the parts being modified inconstruction accordingly. The device has also simplicity and cheapnessin construction, and may be made to operate successfully within muchless space than other devices for the same purpose.

I claim- 1. In combination with the escapement of a clock-movement, animpulse-arm, B, and the wheel A on a shaft holding a second-hand havinga suitable dial, substantially as and for the purposes described.

2. In combination with a clock-movement, the wheel A on a shaft holdinga second-hand having a suitable dial, the impulse-arm B, attached to avibrating part of the clock-escapement, and the'lever E, having adetent, sub- FRED L. GREGORY.

WVitnesses:

H. H. J URGIN. J. E. WILEER.

